Thank you.
I was experiencing the same disappearance phenomenon. I’m hosting a dozen child-portals in one installation, currently dnn9.10.01. 

I’ve done a few tests, thanks to you, I knew what I was looking for. In my case, the problem appears to be related only to the JS minify fonction. It makes no difference to manage the resources “Global” or just for the portal. 

If I remember correctly, the bug appeared after I removed telerik; the installation was a dnn9.9.1 at that time. However, I upgraded to dnn9.10.0 immediately after, so it’s hard to say which procedure caused the problem. 

I wonder if something like this can solve the problem. https://github.com/Engage...JavaScript-Libraries

 

Those libraries are already registered and I see no issues with them or anything that would explain why minifiying JS breaks it.  Since setting up a new fresh instance and ONLY doing the Telerik removal did not exhibit the problem, I'm going to try rebuilding the DNN instance from scratch and see what results.

But, hopefully, someone will have found a cause and solution that has eluded me thus far before I go that route.  Thankfully, this is still in early development so it's not in Production yet and I still have that option available to me.

I just tried to duplicate this issue in a clean installation of DNN Platform 09.10.02 and wasn't able to.  Everything continues to load.  

With that being said, I'd suggest leaving this feature turned off entirely and use a website application firewall (WAF) and let that do it instead.  Providers like CloudFlare do a far better job of modification and there are the security and performance benefits that come along with it.  

I forgot to mention I also saw a similar issue reported in GitHub though.  

https://github.com/dnnsof...Platform/issues/4908

I did the same. In trying to figure out the issue, I setup a new instance and only removed Telerik and nothing else and had no issue. We use Cloudflare in Production but not in Dev, so I can't rely on them do the minification at this stage.

Since the site is still in early development, I'm going to stand up a new instance, remove Telerik, verify no problems, then start rebuilding it using that new instance which should hopefully avoid the problem altogether.

I'm experienceing the same issue. I have a copy of an existing site on development, that's been upgraded to the latest version of DNN. I've followed all steps listed to remove Telerik. When JS minification is on, the assets page won't load and displays the same errors in the browser console.

All other site pages function normally, but once the new asset module has been added to a page, that page won't load properly.

Was anyone able to figure out a solution to this?

I wasn't able to get rid of it. I even deleted and recreated the site from scratch, did nothing but the Telerik removal, but this time the error persisted (but when I did the same thing in my local DEV instance, the error went away). So, I'm stuck with it for now. I turned off JS minification and enabled Cloudflare for our UAT environment but I really didn't want to have our UAT environment using Cloudflare so I'd love to not need that anymore.

Thanks for the reply. Yeah, it's definitely not ideal. I'd rather not have to try to go in a different direction for minification also.

I think this might be the same issue?
If not, please create one or the issue will not get fixed in a future version.

https://github.com/dnnsof...Platform/issues/4885