Hi!
Have you tried anything to resolve this issue? There are a few steps described in this knowledge base article, which might help you locate the source of the problem.
These types of issues are usually (not always) related to 3rd party plugin malfunctions or theme issues. It’s impossible to tell however without seeing the problem. Can you please provide temporary log-in and FTP access to your test environment where I can check and debug the issue?
It will help me to locate and possibly fix the issue as soon as possible. Thank you!