Here is the original item:
Erin cannot tolerate tight and restrictive clothing. Because, she claims,
she was wrapped too tightly as a mummy in her previous Egyptian life.
You chose to connect the subordinate clause to the main clause in front, like this:
Erin cannot tolerate tight and restrictive clothing,
because, she claims, she was wrapped too tightly as a mummy in her
previous Egyptian life.
Unfortunately, you cannot connect these two parts with a comma. Review the rules.