Same issue here,
What Exactly happen I was deploying WordPress in sub domain and above error (Screenshot error). There was no option to cut or cancel the error. So I decided to clear cache and restart vps.
After when I login url and entered the credentials and now it's showing loading. I have gone through almost all forum regards this issue. I couldn't get my issue resolved.
I don't what to reinstall the aapanel again and again almost 10+ times done and now am I sick of bunch of errors. Please do help
bt 22 >> Executing