1)Downgraded to your brevious theme version
Or
2) use your backup (if you ever make one)
P.S a) you post in wrong section
b) you didn't give no information about your site... even if someone want to help you ,how is going to do that? ;)
Why you allways have to switch theme? Just create a child theme before you start customize your website.
If you have experience with wordpress how you say ,you should know that.
1)install a wordpress
2)use a backup plugin
3)use a security plugin
4)create a F****** child theme
5)customize...
And you still don't know how to use the maintenance plugin for the changes take effect after you customisation?
Yes ofcource they know ,but they work for the general public proplem.
No for they one which easy can be solve with multiple ways!!!
You just don't like to put the work down ! But I...
everybody have good result with social rabbit .. check them knowledge base for any question you may have!!!
https://socialrabbitplugin.com/knowledge-base/for-wordpress/