Solved Profile information does not save

Ok, I think I've done what you said and here's the new report. I did still get that error, but the Kunena menu was restored. Also, are you saying that Kunena menu items have to stay in the Kunena menu and can never be added to the main menu in order to function properly?

Even after doing that I'm still not able to save anything to the profile.

Database collation check: The collation of your table fields are correct

Joomla! SEF: Enabled | Joomla! SEF rewrite: Disabled | FTP layer: Disabled |

This message contains confidential information

htaccess: Missing | PHP environment: Max execution time: 300 seconds | Max execution memory: 512M | Max file upload:

Kunena menu details:

Warning: Spoiler!

ID	Name	Menutype	Link	Path	In trash
198	Forum	kunenamenu	view=home	forum	No
199	Index	kunenamenu	view=category&layout=list	forum/index	No
200	Recent Topics	kunenamenu	view=topics&mode=replies	forum/recent	No
201	Unread	kunenamenu	view=topics&layout=unread	forum/unread	No
202	New Topic	kunenamenu	view=topic&layout=create	forum/newtopic	No
203	No Replies	kunenamenu	view=topics&mode=noreplies	forum/noreplies	No
204	My Topics	kunenamenu	view=topics&layout=user&mode=default	forum/mylatest	No

Joomla default template details : cassiopeia | author: Joomla! Project | version: 1.0 | creationdate: February 2017

Kunena default template details : Aurelia | author: Kunena Team | version: 6.0.0 | creationdate: 2022-06-10

Kunena template params:

Warning: Spoiler!

DefaultCategoryicon
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Kunena version detailed: Kunena 6.0.0-GIT | 2022-06-10 [ Git Repository ]
| Kunena detailed configuration:

Warning: Spoiler!

Kunena config settings:
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| Kunena integration settings:

Warning: Spoiler!

Kunena - Finder Disabled
Kunena - AltaUserPoints Disabled
Kunena - Community Builder Disabled
Kunena - Easyblog Disabled
Kunena - Easyprofile Disabled
Kunena - Easysocial Disabled
Kunena - Gravatar Disabled
Kunena - JomSocial Disabled
Kunena - Joomla Enabled: access=1 login=1
Kunena - Kunena Enabled: avatar=1 profile=1

| Joomla! detailed language files installed:

Warning: Spoiler!

Joomla! languages installed:
en-GB	English (United Kingdom)

Third-party components: None

Third-party SEF components: None

Plugins: None

Modules: None

You write "Since I added a Let's Encrypt SSL cert through Certbot " that the problem occurs.
Was it okay for that time?
And with which hoster is the website hosted, is the certificate supported there?
Certbot suport hosters

Yes, but there were actually two things that happened. I pointed my domain to the website, then created the SSL certificate. Before doing those two things, adding information and avatars to user profiles worked. I'm hosting this on Linode, and while Linode says they have support for Certbot, I do not see them on the list you provided.

It is quite possible that the error occurred in this context. Incorrectly created menu items do not always become apparent immediately. But whether the certificate causes an error can only be said when the menus are created correctly. This is still not the case.
.
 
.
What happened to this (red marked) menu item? This menu item has no target. It is the parent menu item so that the Kunena menu works at all. By default, the target "Recent Topics" is selected, but any other subordinate Kunena menu item like "Index" can be selected as landing page.

Furthermore, I don't see the menu item Profiles. If you removed this, you can't edit the profile information.

Also, are you saying that Kunena menu items have to stay in the Kunena menu and can never be added to the main menu in order to function properly?

Yes, that's exactly what I mean. Links of other menus, which are linked to the forum, must be Menu Item Type = Menu Item Alias 
Menu Issues  
.
 

Thank you for the information regarding the Kunena menu placement and menu items linking to it. That all makes sense. 

Regarding what's going on with the "Forum" menu item, I have no idea. That was the result after using the Restore Kunena Menu tool without making any additional changes. I have however made some changes since I sent in that report, so here's the new report. Hopefully I haven't made the situation any worse. 

 

Database collation check: The collation of your table fields are correct

Joomla! SEF: Enabled | Joomla! SEF rewrite: Disabled | FTP layer: Disabled |

This message contains confidential information

htaccess: Missing | PHP environment: Max execution time: 300 seconds | Max execution memory: 512M | Max file upload:

Kunena menu details:

Warning: Spoiler!

ID	Name	Menutype	Link	Path	In trash
198	Resident Forum	kunenamenu	view=home&defaultmenu=121	forum	No
199	Index	kunenamenu	view=category&layout=list	forum/index	No
200	Recent Topics	kunenamenu	view=topics&mode=replies	forum/recent	No
201	Unread	kunenamenu	view=topics&layout=unread	forum/unread	No
202	New Topic	kunenamenu	view=topic&layout=create	forum/newtopic	No
203	No Replies	kunenamenu	view=topics&mode=noreplies	forum/noreplies	No
204	My Topics	kunenamenu	view=topics&layout=user&mode=default	forum/mylatest	No
205	User Profile	kunenamenu	view=user	forum/edit-profile	No

Joomla default template details : cassiopeia | author: Joomla! Project | version: 1.0 | creationdate: February 2017

Kunena default template details : Aurelia | author: Kunena Team | version: 6.0.0 | creationdate: 2022-06-10

Kunena template params:

Warning: Spoiler!

DefaultCategoryicon
profileIconset	default
DefaultIconset	default
editorIconset	default
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borderless	1
tooltips	1
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fullactions	1
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topicicontype	svg
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IconColor	inherit
IconColorNew	#2ba84a
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JustifyRight	1
JustifyBlock	1
Link_Unlink	1
Image	1
Smiley	1
Confidential	1
Hidetext	1
Spoiler	1
Code	1
Ebay	1
Twitter	1
Instagram	1
Soundcloud	1
FontSize	1
TextColor	1
Maximize	1
Map	1
Video	1
editorButtons
nameskinckeditor
ckeditorcustomprefixconfigfile
avatarSizeX	40
avatarSizeY	90
avatarSizeXThumb	36
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avatarSizeYList	36
avatarSizeXPost	144
avatarSizeYPost	144
avatarSizeXProfile	200
avatarSizeYProfile	200
templatebyText
templatebyName
templatebyLink

Kunena version detailed: Kunena 6.0.0-GIT | 2022-06-10 [ Git Repository ]
| Kunena detailed configuration:

Warning: Spoiler!

Kunena config settings:
boardOffline	0
enableRss	1
threadsPerPage	20
messagesPerPage	6
messagesPerPageSearch	15
showHistory	1
historyLimit	6
showNew	1
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| Kunena integration settings:

Warning: Spoiler!

Kunena - Finder Disabled
Kunena - AltaUserPoints Disabled
Kunena - Community Builder Disabled
Kunena - Easyblog Disabled
Kunena - Easyprofile Disabled
Kunena - Easysocial Disabled
Kunena - Gravatar Disabled
Kunena - JomSocial Disabled
Kunena - Joomla Enabled: access=1 login=1
Kunena - Kunena Enabled: avatar=1 profile=1

| Joomla! detailed language files installed:

Warning: Spoiler!

Joomla! languages installed:
en-GB	English (United Kingdom)

Third-party components: None

Third-party SEF components: None

Plugins: None

Modules: None

In principle, almost everything is correct. Only the menu item Residents forum needs to be adjusted. Go to the Kunena menu and open the Residents Forum menu item. Select the landing page again and save it, because the view=home&defaultmenu=121 is wrong (probably comes from the cache). Then check the address, you'll see it directly in the menu item (depending wath you choose, Index is view=home&defaultmenu=199 and Recent Topics view=home&defaultmenu=200).