Marketplace error after upgrading snap installation from 7.x to 8.x

Description:

We are running Rocketchat with snap.
Due to the nearing support end of 7.13 we switched to 8.3.2 (Snap 8.x/edge) which is the only still supported version available via snap.
Upgrading worked without a hitch.
The only problem is that now the Marketplace does not work.

We get the following error in the systemd journal:

rocketchat-server.rocketchat-server[16790]: Subprocess stderr error: Specifier not found in cache: "https://registry-staging.deno.com/@std/io/meta.json", --cached-only is specified.
rocketchat-server.rocketchat-server[16790]:     at file:///tmp/apps-engine-temp/deno-runtime/lib/metricsCollector.ts:1:26

This seems to be a problem with Deno.
That's as far as I have been able to debug the problem.
Since it is a snap installation I cannot access or change anything about the used Deno version.

On the client side i get a "Connection error" if I try to open Marketplace.

Server Setup Information:

• Version of Rocket.Chat Server: 8.3.2
• License Type: Community
• Number of Users: 82
• Operating System: Ubuntu
• Deployment Method: snap
• Number of Running Instances: 1

Start with the Deno error from metricsCollector.ts in the snap's systemd journal and compare the Marketplace failure with the reported Rocket.Chat 8.3.2 snap setup. Trace why the cached-only runtime cannot resolve https://registry-staging.deno.com/@std/io/meta.json; done means Marketplace opens without the client connection error after upgrading from 7.x.