Add hint about blocked Javascript as possible error reason in script-loader.php

[tobifjellner]

When trying to do various things with a new site, I got the same error message over and over:
Connection lost or the server is busy. Please try again later.

I even reinstalled, but the error didn't go away. When I revisited the issue next day, finally realized what silly mistake i had made.

In order to help other people with same issue, we only need to change the string above in /wp-includes/script-loader.php (around row 840) into:
Connection lost, the server is busy, or you may have blocked JavaScript. Please try again later.

[SergeyBiryukov]

I tried editing a post or leaving a tab in background for a while with JavaScript disabled in Opera dev tools, but could not reproduce this message. Could you clarify the steps to trigger it by disabling JavaScript?

[tobifjellner]

Steps to reproduce:

1. Leave domain in "default" with NoScript, using Firefox 59 on Win 10
2. Install fresh WordPress (I used 4.9.5).
3. Open Plugins - Installed plugins. Click on "Delete" next to "Hello Dolly".
4. A dialog appears "Are you sure..." - Click "OK"
5. An admin notice appears (immediately): Deletion failed: Connection lost or the server is busy. Please try again later.

Alternatively
3a. Tools-import
4a. Click on any "Install Now" (I used import tool for WordPress)
5a. An admin notice appears (immediately): Installation failed: Connection lost or the server is busy. Please try again later.

(Edit: corrected chosen state for NoScript)

[subrataemfluence]

I would like to test this at my end. Would you mind telling me how to "Leave domain in default with NoScript..."? Although I am on Ubuntu, I believe if its a bug in WP core it should popup irrespective of operating system!

Replying to tobifjellner:

Steps to reproduce:

1. Leave domain in "default" with NoScript, using Firefox 59 on Win 10
2. Install fresh WordPress (I used 4.9.5).
3. Open Plugins - Installed plugins. Click on "Delete" next to "Hello Dolly".
4. A dialog appears "Are you sure..." - Click "OK"
5. An admin notice appears (immediately): Deletion failed: Connection lost or the server is busy. Please try again later.

Alternatively
3a. Tools-import
4a. Click on any "Install Now" (I used import tool for WordPress)
5a. An admin notice appears (immediately): Installation failed: Connection lost or the server is busy. Please try again later.

(Edit: corrected chosen state for NoScript)

[tobifjellner]

Replying to subrataemfluence:

I would like to test this at my end. Would you mind telling me how to "Leave domain in default with NoScript..."? Although I am on Ubuntu, I believe if its a bug in WP core it should popup irrespective of operating system!

When I check Firefox extension Noscript seems to be available on Linux, too. So yes, it would be nice if you could test and confirm this situation.

If I recall correctly, the default setting in Noscript, when you activate the add-on, all domains will be "untrusted", until you mark them as trusted.

You may test this the other way around: Activate NoScript and configure it to trust everyone, but mark the domain of your website as "untrusted".

Next: try to delete some unneded plugin. Or try to add some import tool. In both these cases I got this error message, which solely talked about server and/or connectivity issues, when the real culprit was that I still hadn't whitelisted my new domain in NoScript. :)

I'll be eagerly waiting for your comments. If you need a hand during testing, you may DM me on Slack, too. Same username.

[subrataemfluence]

Thanks so much! I will be into this tomorrow since its almost midnight here! :)

Replying to tobifjellner:

Replying to subrataemfluence:

I would like to test this at my end. Would you mind telling me how to "Leave domain in default with NoScript..."? Although I am on Ubuntu, I believe if its a bug in WP core it should popup irrespective of operating system!

When I check Firefox extension Noscript seems to be available on Linux, too. So yes, it would be nice if you could test and confirm this situation.

If I recall correctly, the default setting in Noscript, when you activate the add-on, all domains will be "untrusted", until you mark them as trusted.

You may test this the other way around: Activate NoScript and configure it to trust everyone, but mark the domain of your website as "untrusted".

Next: try to delete some unneded plugin. Or try to add some import tool. In both these cases I got this error message, which solely talked about server and/or connectivity issues, when the real culprit was that I still hadn't whitelisted my new domain in NoScript. :)

I'll be eagerly waiting for your comments. If you need a hand during testing, you may DM me on Slack, too. Same username.

[subrataemfluence]

Hi @tobifjellner I installed NoScript and tried to reproduce the issue. Here are my observations (I am on Ubuntu with FireFox 59.0.2 (64-bit).

1. Marked my own site untrusted. Screenshot untrusted-site.png.

2. I could not see the error message you mentioned. Please see screenshot error-filer-result.png

3. Screenshot content-security-policy.png - list of console errors and earning.

4. What I noticed is no dashicon is appearing for native WordPress menu items (this is out of the scope of this discussion though)

[tobifjellner]

Thanks a lot, @subrataemfluence
So it seems that on Linux one will end up with other error than the one I encountered. Interesting!

[subrataemfluence]

Yes! And since JS is disabled, the action goes along in server-side way without hampering the workflow of plugin deletion method.

Replying to tobifjellner:

Thanks a lot, @subrataemfluence
So it seems that on Linux one will end up with other error than the one I encountered. Interesting!