@seb-wahl,

I check your workflow file and find few syntax errors below:

1. I see you set two ‘push’ event with different configurations in the same workflow.
   When using the ‘on’ key to set triggers, an event only can be used once in the same workflow, you can’t use the same event multiple times.
   If you want to a same event can trigger workflows with different configurations, you need to setup a workflow for each configuration, instead of using only one workflow.

2. The key ‘on’ is a keyword of the workflow syntax, you should not surround it with any other symbols (such as quotes or brackets). It is followed by the symbol colon (:).

3. When you use the ‘run’ key to set a step to run some command lines,

   • if it only is a single line command, you can directly place the command and the ‘run’ key at the same line. For example:

     run: echo "There is only a single line."
     

   • if it is multiple command lines, you need to use the symbol ‘|’ to declare the multiple command lines. And the first command line also should be at its own line. For example:

     run: |
       echo "There is command line 1."
       echo "There is command line 2."
       . . .
       echo "There is command line N."
     

     In addition, you do not need to use the quotes to surround the whole command lines.

More details about workflow syntax, see “Workflow syntax for GitHub Actions”.

Please try to fix these syntax errors to see if the problem still exists.
The following is the workflow file I forked from yours, and I have fixed the syntax errors I can find. You can refer to it.

ForksForTest/esm_tools/blob/90c5748352b1007acb0945e8aa11b706247d4957/.github/workflows/CI-blogin-install-run-foci.yml

name: CI-blogin-install-foci-default
on:
  push:
    branches:
    - refac_master_foci
  pull_request:
    branches:
    - release
    - develop
    - '*prep-release*'
    paths:
    - configs/setups/foci.yaml
    - configs/components/xios.yaml
    - configs/components/echam.yaml
    - configs/components/nemo.yaml
    - configs/components/oasis3mct/oasis3mct.yaml
    - configs/couplings/nemo-ORCA05_LIM2_KCM_AOW+echam-6.3.05p2-foci.yaml
jobs:

install_models:

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