Hi guys, I can't solve this problemwith my AcyMailing 5.10.21

Several years ago I did install Front-end user managment with another Joomla installation now 3.9.26 and it's still running well. Now I try it with another Joomla installation but I get error 404. With the menu item it shows another url. I did install Breezing forms like with the other before and the package "BreezingForms-Standard Piece and Script Libraries". Is there anywhere a manual to find how to deal with it?
Many thanks for a hint!

Do you have sh404sef extension or any other similar SEF extensions installed on the site?

Thanks for answering me and sorry for delay. In the meanwhile the problem was solved but since yesterday it happens again. To your question: no, I don't have any of this extesions. It refers to SEO, right? May be my problem could be caused do to the fact, that for using the plugin Frontend user managment Enterprise Version is needed? After my post above I did install AcyMailing Enterprise 5.10.21 there from another license but it got recognized as without license. As I said: first it started to work but no it wouldn't anymore.

What a miracle - it runs again. But by the way, if you find the time to have a look at my posts: as I wrote above, I have another Joomla with (a licensed) AcyMailing. I matched both configurations but can't find any different. But there is a different in the choosen URL at status line while mouse over the link. In case of the licensend installation there get shown: mysite.com/linkname. In case of the struggling AcyMailing there get shown myothersite.com/index.php/linkname. Why does this happen or what could be the reason? And, while it not work properly, there get shown myothersite.com/index.php/Categories/linkname. But this seemed to get changed by a wizards hand (or a remote configuration by AcyMailing?).
Anyway, many thanks for notice me.
heinzeric

This problem with the URLs is related to your Joomla global SEF configuration so match them both and see the difference

Ah, I see: in the licend one it is "Use URL Rewriting" = yes, in the other = no. If I set it there = yes as well there works nothing anymore. I guess it makes no important different, wouldn't it?

When you enable "URL rewriting" and your website stops to work properly, it can only mean that you didn't rename htacess.txt file in your Joomla root folder to ".htaccess". That is the first and most obvious cause

a month later

Hi, me again, because the problem happens again. When I try to open the link for the frontend unser managment I get error 404 and get shown in the status line domain/Categories/alias_menuname. In the meantime I renamed htaccess.txt to ".htaccess" and enabled "URL rewriting". It works well. But what could cause this problem? Maybe you have an idea?
Thanks