I locked out myself from the website.
Your Troubleshooting doesn't work for me with the addition of the E-Mail adress to the URL.
What always worked fine (Joomla 3) was the main-disable function in the folder: plugins/system/admintools/admintools
Well in Joomla 4.0 I can't find the main file.
Where did you put it here?
Or which file do I need to look for? Did you rename it?
Thanks for help!