500 error trying to open Item page!!!

Hello, Codester team!

The problem arised yesterday evening, suddenly the Item's page (any Item, not just mine) disappeared, I have just blank page (in some browsers) or the 500 error in another browsers

time from time there is CloudFlare protection page is shown, but in most cases there is just blank page or the 500 error page (depending on the browser)

Here is what I see in chrome:
https://clip2net.com/s/4azGIGX (this is for ANY item's page, other pages are accessible)
I tried to catch it via VPN in FireFox, Item's page is visible but trying to catch "Comments" or "Reviews" tab I have fully blank page:
https://clip2net.com/s/4azGNRB
https://clip2net.com/s/4azGOQq
In Opera I also can see the Item's page but have 500 error trying to get "Comments" or "Reviews" tab of ANY extension:
https://clip2net.com/s/4azGRwR

One important note: If the tab is empty (no reviews or no comments), the page is opened normally (the example: https://clip2net.com/s/4azGYBx), but if there is some content (at least 1 comment or review) - there will be blank page or the 500 error page

Of course, ALL cookies and other userdata is removed periodically from all browsers , but the problem remains...

Has anyone from the Codester's users the same problem, please reply here in this topic

@Codester team: what I'm doing wrong, may be this is just some maintenance process and i just need to wait?
PLEASE, reply

Many thanks in advance

Same happening with others like:
https://www.codester.com/items/reviews/15883/mailcarry-email-marketing-software

I think it's on all codester product page :/

We are currently upgrading our server, which is the cause of the errors. we soon hoop to have this solved.

Our apology for any inconvenience.

We just fixed a great bunch of these errors.

If you still find any errors, please let us know!

Yes Frederick. Exactly i get this error when i opened each product pages. but today seems it was fixed. thanks

Yes, thank you, Frederick, issue is fixed now

Can not upload item images
http://prntscr.com/x0jd9y

Can you upload other files like zip files?

And what is the filename of the image file?

No, also zip files cant be uploaded. I tried files named, logo.png and screenshots.zip

Is this for an item update or submitting a new item