1. Try to install any other extension. If install successfully then follow the 2nd step. If not then some issue on your side.
Yes other extensions can be installed normally with no issues.
These tips I did earlier and I repeated them again with no success.
It looks like there is a lot of work need to be done for jdbuilder to work properly .. it's not working at all on the website.
I shared admin login several times before through email.
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