[imp] imp/null 'File does not exist error' in compose-dimp.php (IMP 5.0.14)

[Pro Green European]

Hi.

I've started seeing this error message in my error log:


[xxx xxx xx xx:xx:xx xxxx] [error] [client x.x.x.x] File does not exist: /home/mymail/public_html/imp/null, referer: https://mymail.srv.tld/imp/compose-dimp.php?type=new&ajaxui=1&uniq=1234567890123

Help on finding out what's causing this problem would be greatly appreciated.


Thx,
/PGE