Hover your cursor over the red X and you will see this from the Responsive FileManager:

<h2>Incomplete response received from application</h2>

Tried different browsers and a different computer already, this is an AR issue.  Also not cool that the new AR doesnt have live Technical Support folk to interact with but they do promise you a reply within 48 hours via email.  Craptastic!

Yoiu're not alone - wait till later - it should be ok

Same here. Tried both Chrome and FF several times. It's not something wrong with the file name and funny characters - I've learned that!!

Joanna,

Had the same thing happen to us.  Here is a workaround.  Post it to your website's blog, and then copy it to AR.  That is what worked for me.  Do not use Safari as it does not let you copy.  I used Firefox.  Good luck.  A

Seens we are all having problems today!

This happens to me each and every day. I have tried reformatting images, changing file names, nothing's worked. Pretty frustrating when the post is all about the image you're trying to post. 

Saw a post from Bob Stewart that this was fixed, we were all having issues.

You are not alone. A lot of similar questions posted.

Damn Asian cameras!

Affecting many apparently

Many have the same issue.

Copy and paste is an alternative.

Good luck.

Glitches happen.   

Joanna Cohlan that seems to be the case, today. I am sure it's been corrected by now....

I have had no issue yet

I got the same message and tried and tried. I finally figured out it was AR's problem.

It was a very frustrating time for me to try to get a photo uploaded. I never did get it done. 

Mine loaded yesterday but took forever.

AR Ambassadors are talking about in their secret Facebook Group.   No solution has been mentioned by AR Staff yet.

It seems to be a widespread glitch...

sounds like you had lots of company

I can't even answer questions about it!

Well I'm not happy about it but at least kow I'm not alone.  Tried both IX and Firefox and got the red X

Looks like three questions on this right here, probably not a good time to post a pic right now.

it has always been an issue if you load 2 one will disappear. So I just upload one....

yes, I tried many times and I saw the red X

Yeah me too. I posted a question too. Seems we are not alone. I have a "ticket" pending with AR. No real reply yet just an email saying they received my report and have assigned it a ticket numer.

I've been getting a Please Wait when liking comments  ... and it seems to just hang.

Just tried to upload a photo and I am getting a red X.  

It seems that a few people are having issues today.

Maybe try a different browser.

I was able to copy the photo and paste it to the post.

Haven't tried yet, but hope it has been repaired.