Problems building extensions in VS Code: "Unable to load schema ..."

AntonioSousa — Sun, 22 Feb 2026 19:39:57 GMT

Today, I'm trying to build an extension I had to test. Can't manage to do it through the GUI, as it says:

Unable to load schema from '/home/administrator/.config/Code/User/globalStorage/dynatraceplatformextensions.dynatrace-extensions/1.285.0/extension.schema.json': No content.

It really depends, I have a lot of different ones, both from old/new schemas:

Problems loading reference 'http://abc12345.live.dynatrace.com/api/v2/extensions/schemas/1.285.0/log.processing.rule.schema.dql.json': Unable to load schema from 'http://abc12345.live.dynatrace.com/api/v2/extensions/schemas/1.285.0/log.processing.rule.schema.dql.json': No content.
Problems loading reference 'http://abc12345.live.dynatrace.com/api/v2/extensions/schemas/1.285.0/log.processing.rule.schema.json': Unable to load schema from 'http://abc12345.live.dynatrace.com/api/v2/extensions/schemas/1.285.0/log.processing.rule.schema.json': No content.
Problems loading reference 'http://abc12345.live.dynatrace.com/api/v2/extensions/schemas/1.331.0/log.metrics.dql.schema.json': Unable to load schema from 'http://abc12345.live.dynatrace.com/api/v2/extensions/schemas/1.331.0/log.metrics.dql.schema.json': No content.

In the process, I have seen that the schemas are really downloaded with HTTP, but then it redirects:

GET /api/v2/extensions/schemas/1.285.0/log.processing.rule.schema.dql.json HTTP/1.1
Accept-Encoding: gzip, deflate
Host: abc12345.live.dynatrace.com
Connection: close
HTTP/1.1 307 Temporary Redirect
content-length: 0
location: https://abc12345.live.dynatrace.com/api/v2/extensions/schemas/1.285.0/log.processing.rule.schema.dql.json
cache-control: no-cache
connection: close

Even creating an extension from scratch yields the same issue. Tried also with two different tenants, same result.

The files in VS Code are OK. I even restarted a VM I'm sure was working about a month ago, and it has the same problem.
Compiled with dt-sdk, they do compile. And they also run locally.

Re: Problems building extensions in VS Code: "Unable to load schema ..."

Julius_Loman — Sun, 22 Feb 2026 19:47:19 GMT

Hi @AntonioSousa ,

this is caused by update of RedHat yaml extension is vscode. I also sumbled upon this on Friday afternoon. Already known issue and reported: https://github.com/dynatrace-extensions/dynatrace-extensions-vscode/issues/285 . Just downgrade the yaml extension and disable it's autoupdate for a while to get this working again.

Re: Problems building extensions in VS Code: "Unable to load schema ..."

AntonioSousa — Sun, 22 Feb 2026 19:55:43 GMT

@Julius_Loman ,

Thanks so much! I downgraded almost everything, except the yaml extension. Working again!

Re: Problems building extensions in VS Code: "Unable to load schema ..."

StrangerThing — Thu, 26 Feb 2026 16:01:18 GMT

Glad I thought to check the community for this! Been struggling with this issue for an hour at least. Thanks guys!

topic Problems building extensions in VS Code: "Unable to load schema ..." in Extensions

Problems building extensions in VS Code: "Unable to load schema ..."

Re: Problems building extensions in VS Code: "Unable to load schema ..."

Re: Problems building extensions in VS Code: "Unable to load schema ..."

Re: Problems building extensions in VS Code: "Unable to load schema ..."