When configuring CA certificates to HelmChartRepository or ProjectHelmChartRepository, the charts installation breaks with error:
~~~
The Helm Chart is currently unavailable. r: Failed to retrieve chart: error locating chart: looks like <CHART> is not a valid chart repository or cannot be reached: open /.cache/helm/repository/7SBgIZuloO16-c-1e4w-aDA1c0I=-index.yaml: no such file or directory
~~~

Verified on OCP 4.14 and 4.15

Always

1. Go to OCP console > Developer view > Helm > Browse the catalog to discover available Helm Charts
2. Select any Chart (e.g. ".NET Application") and select "Create"
3. Note that the installer properly works
4. Create a new configmap with the certificate of openshift.io:
       ~~~
       $ vi openshift-io.crt       
       
       -----BEGIN CERTIFICATE-----
       MIIE+DCCA+CgAwIBAgISBFRwCtid6L+QgrIjrTC4KN4WMA0GCSqGSIb3DQEBCwUA
       MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
       EwNSMTAwHhcNMjQxMTA1MDczNjE4WhcNMjUwMjAzMDczNjE3WjAeMRwwGgYDVQQD
       ExNjaGFydHMub3BlbnNoaWZ0LmlvMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB
       CgKCAQEAmJhY6+zLtneB6HAOhyIx79JjY2cBnJBOEBaUnPUZtgUwVraCQWLUMQt5
       wNThwTYTH1xwFiHQHFMTjDwMjF0VR/jHlClBj8Ljsim2G3eNqHPq2GORN9ImUGGh
       BL36diIGpaA93AdLj7cGJLYXki7JrtwWLCzDbJQjLZ+d1EDamCY9Z4c3tkyko+5S
       MeOHLO047nCltZh9w4eW+y5FbKJsJP9jQrbkfNRfa5ZzJHoMpYlohvFxA3lTDogc
       blql8IAMZg2koiC1uQkcADWPPImnioxOV/0eKBk6Y9BWA+n1Mg03QD+akHEz19e0
       fkFItAWqjvdlNoeHZsr/bYND70isjQIDAQABo4ICGTCCAhUwDgYDVR0PAQH/BAQD
       AgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAA
       MB0GA1UdDgQWBBRYybKqaOalSMzYK+hCsr9/vkVmaDAfBgNVHSMEGDAWgBS7vMNH
       peS8qcbDpHIMEI2iNeHI6DBXBggrBgEFBQcBAQRLMEkwIgYIKwYBBQUHMAGGFmh0
       dHA6Ly9yMTAuby5sZW5jci5vcmcwIwYIKwYBBQUHMAKGF2h0dHA6Ly9yMTAuaS5s
       ZW5jci5vcmcvMB4GA1UdEQQXMBWCE2NoYXJ0cy5vcGVuc2hpZnQuaW8wEwYDVR0g
       BAwwCjAIBgZngQwBAgEwggEGBgorBgEEAdZ5AgQCBIH3BIH0APIAdwDPEVbu1S58
       r/OHW9lpLpvpGnFnSrAX7KwB0lt3zsw7CAAAAZL7dlNOAAAEAwBIMEYCIQCJ/iq+
       /H53z4/O/swmV9LXojhAap8csqJZJHMXFrpxNAIhAKNBlQYHKaTbYo6i5zdZqkeT
       E68GpnCXl6XrFsdoALpLAHcA4JKz/AwdyOdoNh/eYbmWTQpSeBmKctZyxLBNpW1v
       VAQAAAGS+3ZTHgAABAMASDBGAiEAvEEI90A/KJ2LAvpIj3AP0Ibz1iPLHqdETyO8
       limdxigCIQC5I/Vz5E35lNfsoAhKi65eCPmdEp0kWm1NkfOj65vxOzANBgkqhkiG
       9w0BAQsFAAOCAQEAY6FtuDIu6FTu+uI7idODy2v7EeceadWyugHTfr+1OZTFFTts
       JXfEX528LrQUAjNraZdkY9MC4r0eAa6vDE8eGYDAGfe4u6gm5wwDMaSUaVCnSvz0
       k7vtOrx7X2mAsTLS2yBXcJRQUXQpWdxWshY9X54UIVvvwDHaf+X47hz01hIWjevl
       WihqpKVX6inU0AfaqXTLNE784AuudMaPSZEiXW717giDQ0hLi3nVlnIDOVAe/2kz
       P0RyX04EnQf88681+TjmyIcMvk7I7B0lgLI/mwsXVl83Sv/bWflrJ1cEczgwzVwp
       pYqGhO0c+ATOh4pvpQfBsKEbw5DFMSEmyXKHkg==
       -----END CERTIFICATE-----
       -----BEGIN CERTIFICATE-----
       MIIFBTCCAu2gAwIBAgIQS6hSk/eaL6JzBkuoBI110DANBgkqhkiG9w0BAQsFADBP
       MQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJuZXQgU2VjdXJpdHkgUmVzZWFy
       Y2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBYMTAeFw0yNDAzMTMwMDAwMDBa
       Fw0yNzAzMTIyMzU5NTlaMDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBF
       bmNyeXB0MQwwCgYDVQQDEwNSMTAwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEK
       AoIBAQDPV+XmxFQS7bRH/sknWHZGUCiMHT6I3wWd1bUYKb3dtVq/+vbOo76vACFL
       YlpaPAEvxVgD9on/jhFD68G14BQHlo9vH9fnuoE5CXVlt8KvGFs3Jijno/QHK20a
       /6tYvJWuQP/py1fEtVt/eA0YYbwX51TGu0mRzW4Y0YCF7qZlNrx06rxQTOr8IfM4
       FpOUurDTazgGzRYSespSdcitdrLCnF2YRVxvYXvGLe48E1KGAdlX5jgc3421H5KR
       mudKHMxFqHJV8LDmowfs/acbZp4/SItxhHFYyTr6717yW0QrPHTnj7JHwQdqzZq3
       DZb3EoEmUVQK7GH29/Xi8orIlQ2NAgMBAAGjgfgwgfUwDgYDVR0PAQH/BAQDAgGG
       MB0GA1UdJQQWMBQGCCsGAQUFBwMCBggrBgEFBQcDATASBgNVHRMBAf8ECDAGAQH/
       AgEAMB0GA1UdDgQWBBS7vMNHpeS8qcbDpHIMEI2iNeHI6DAfBgNVHSMEGDAWgBR5
       tFnme7bl5AFzgAiIyBpY9umbbjAyBggrBgEFBQcBAQQmMCQwIgYIKwYBBQUHMAKG
       Fmh0dHA6Ly94MS5pLmxlbmNyLm9yZy8wEwYDVR0gBAwwCjAIBgZngQwBAgEwJwYD
       VR0fBCAwHjAcoBqgGIYWaHR0cDovL3gxLmMubGVuY3Iub3JnLzANBgkqhkiG9w0B
       AQsFAAOCAgEAkrHnQTfreZ2B5s3iJeE6IOmQRJWjgVzPw139vaBw1bGWKCIL0vIo
       zwzn1OZDjCQiHcFCktEJr59L9MhwTyAWsVrdAfYf+B9haxQnsHKNY67u4s5Lzzfd
       u6PUzeetUK29v+PsPmI2cJkxp+iN3epi4hKu9ZzUPSwMqtCceb7qPVxEbpYxY1p9
       1n5PJKBLBX9eb9LU6l8zSxPWV7bK3lG4XaMJgnT9x3ies7msFtpKK5bDtotij/l0
       GaKeA97pb5uwD9KgWvaFXMIEt8jVTjLEvwRdvCn294GPDF08U8lAkIv7tghluaQh
       1QnlE4SEN4LOECj8dsIGJXpGUk3aU3KkJz9icKy+aUgA+2cP21uh6NcDIS3XyfaZ
       QjmDQ993ChII8SXWupQZVBiIpcWO4RqZk3lr7Bz5MUCwzDIA359e57SSq5CCkY0N
       4B6Vulk7LktfwrdGNVI5BsC9qqxSwSKgRJeZ9wygIaehbHFHFhcBaMDKpiZlBHyz
       rsnnlFXCb5s8HKn5LsUgGvB24L7sGNZP2CX7dhHov+YhD+jozLW2p9W4959Bz2Ei
       RmqDtmiXLnzqTpXbI+suyCsohKRg6Un0RC47+cpiVwHiXZAW+cn8eiNIjqbVgXLx
       KPpdzvvtTnOPlC7SQZSYmdunr3Bf9b77AiC/ZidstK36dRILKz7OA54=
       -----END CERTIFICATE-----
       ~~~       

       ~~~
       $ oc create configmap openshift-io-certs --from-file=ca-bundle.crt=openshift-io.crt -n openshift-config
       ~~~
4. Reference the new configmap to `openshift-helm-charts` HelmChartRepository ca parameter:
       ~~~
       ca:
         name: openshift-io-certs
       ~~~
5. Back to Helm > Browse the catalog to discover available Helm Charts
6. Select again the ".NET Application" chart and then "Create"

The console returns the error:
   ~~~
   Helm Chart cannot be installed
   The Helm Chart is currently unavailable. r: Failed to retrieve chart: error locating chart: looks like "https://charts.openshift.io" is not a valid chart repository or cannot be reached: open /.cache/helm/repository/0V0aN-hX+Ov86TysGXxzemjBVCc=-index.yaml: no such file or directory
   ~~~

The chart installation properly works.