grep failing in gitlab CI

I am trying to finalyze a script in Gitlab CI but struggling with some syntax error

  script: |        
          echo "running jenkins job from user $EMAIL using following settings - $BRANCH /  $TAGS in $ENV enviroment" 
          
          lastbuildNumber=$(curl -s --user ${EMAIL}:${TOKEN} "$JENKINS_URL/$ENV-SmokeTests-UIOnly/lastBuild/api/json"  | jq ".number")

          echo "last build was number ${lastbuildNumber}"
          currentBuild=$((lastbuildNumber + 1 ))  
          
          echo "current build is ${currentBuild}"

          echo "view cucumber report here"
          baseurl="$JENKINS_URL/${ENV}-SmokeTests-UIOnly"
          echo $baseurl
          
          curl -s --user $EMAIL:$TOKEN $JENKINS_URL/$ENV-SmokeTests-UIOnly/ --output cucumber.txt


          cucumber_endpoint=$(cat cucumber.txt | grep -o -m 1 "[a-zA-Z.-]*/cucumber-html-reports_[a-zA-Z0-9.-]*/[a-zA-Z0-9.-]*")

          full_cucumber=$baseurl$cucumber_endpoint

          echo $full_cucumber

The script works fine on my local terminal, but fails in the CI when running

cucumber_endpoint=$(cat cucumber.txt | grep -o -m 1 "[a-zA-Z.-]*/cucumber-html-reports_[a-zA-Z0-9.-]*/[a-zA-Z0-9.-]*")

is for sure something related to quotes but cannot work out what the issue is.

update:

I changed to:

after_script:
    - |
        echo "view cucumber report here"
        baseurl="$JENKINS_URL/job/${ENV}-SmokeTests-UIOnly"

        curl -s --user "$EMAIL":"$TOKEN" $JENKINS_URL/"$ENV"-SmokeTests-UIOnly/ --output cucumber.txt
        cat cucumber.txt 
        
        cucumber_endpoint=$(cat cucumber.txt | grep -o -m 1 '[a-zA-Z.-]*/cucumber-html-reports_[a-zA-Z0-9.-]*/[a-zA-Z0-9.-]*')
        full_cucumber="${baseurl}${cucumber_endpoint}"
        echo "${full_cucumber}"

and I have run the script through 'shellcheck.net'

it's the grep that is not working but is not returning anyerror now.

the result of the cat command are correct, as on my local machine.

proving is not an issue with set -e

#!/bin/bash
set -e
        echo "view cucumber report here"
        baseurl="https://example"

        cucumber_endpoint=$(curl -s --user "$EMAIL":"$TOKEN" ${JENKINS_URL}/"$ENV"-SmokeTests-UIOnly/ | grep -o -m 1 '[a-zA-Z.-]*/cucumber-html-reports_[a-zA-Z0-9.-]*/[a-zA-Z0-9.-]*')
        # cat cucumber.txt 
        
        # cucumber_endpoint=$(cucumber.txt | grep -o -m 1 '[a-zA-Z.-]*/cucumber-html-reports_[a-zA-Z0-9.-]*/[a-zA-Z0-9.-]*')
        full_cucumber="${cucumber_endpoint}"
        echo "${baseurl}${full_cucumber}"

which gets what I want:

 ➜ ./cucumber.sh                                                                                                                                                                                                                                         [16/02/23|11:39:59|]
view cucumber report here
https://example/cucumber-html-reports_fb3a3468-c298-3fb5-ad9a-dacbc0323763/overview-features.html

apparently gitlab ci did not like the -m 1 option in the grep call

so changed to

cucumber_endpoint=$(curl -s --user "$EMAIL":"$TOKEN" ${JENKINS_URL}/"$ENV"-SmokeTests-UIOnly/ | grep -o '[a-zA-Z.-]*/cucumber-html-reports_[a-zA-Z0-9.-]*/[a-zA-Z0-9.-]*'| sort -u)