(?#_text_c==0)"[^/]*?"
Isn’t exactly a fix as it makes it impossible for the string to contain a /.
Side note:
The regex I use in the example are intentionally simplified for the sake of illustration.
The regex to match a string actually is (?#_text_c==0)".*?(?<!\\)", which in the example is simplified to (?#_text_c==0)”.*?”.