Whitepage on /admincp/wiki_cp.php?panel=impex&do=import
/admincp/wiki_cp.php?panel=impex&do=import
This is showing a whitepage. In the console I see some SSL errors:
Strict-Transport-Security: The connection to the site is untrustworthy, so the specified header was ignored.[Learn More] wiki_cp.php
This site makes use of a SHA-1 Certificate; it's recommended you use certificates with signature algorithms that use hash functions stronger than SHA-1.[Learn More]
This doesn't make any sense. Other pages work without problems.