My forum opens some times whit a white page

[x-tream]

So topic says it all .

Heres an image:
https://2img.net/r/ihimizer/img80/826/nimetn1111iu8.jpg

This problem happens whit other people too so i'm noth the only one having this problem.
Some times the site works and some times it doesn't.
I have tested whit different browsers, but still nothing happens

Other guestion is that for some reason one of the member has a problem that the forum presses the "mark all read" ( or something like that ) So that he doesnt know where the new post are.

Oh and the web site is this: ( The site is in finnish so you wont probly understand... )
http://uows.forumotion.com
and i'm one of the admins in that forum ( donno why i sayd it maybe my ego )

W8 for a answer

~ Regards X-Tream

Ps. sorry for my english noth so good at it .

[Mariko21]

the issue exists & is talked about here=> https://help.forumotion.com/connection-problems-f42/my-forum-cut-off-t18570.htm