Danke Martin,
habe auch schon einige Zeit mit Versuchen verschwendet und genau so wie Du es schreibst geht’s jetzt.
Die Fehlermeldung war bei mir wie folgt:
Loading composer repositories with package informationUpdating dependencies
Your requirements could not be resolved to an installable set of packages.
Problem 1
- oxid-esales/testing-library v4.0.1 requires oxid-esales/oxideshop-unified-namespace-generator ^1.0.0 → satisfiable by oxid-esales/oxideshop-unified-namespace-generator[v1.0.0].
- oxid-esales/testing-library v4.0.0 requires oxid-esales/oxideshop-unified-namespace-generator ^1.0.0 → satisfiable by oxid-esales/oxideshop-unified-namespace-generator[v1.0.0].
- oxid-esales/testing-library v4.0.0-beta.1 requires oxid-esales/oxideshop-unified-namespace-generator ^1.0.0 → satisfiable by oxid-esales/oxideshop-unified-namespace-generator[v1.0.0].
- oxid-esales/testing-library v4.0.0-beta.2 requires oxid-esales/oxideshop-unified-namespace-generator ^1.0.0 → satisfiable by oxid-esales/oxideshop-unified-namespace-generator[v1.0.0].
- oxid-esales/testing-library v4.0.0-beta.3 requires oxid-esales/oxideshop-unified-namespace-generator ^1.0.0 → satisfiable by oxid-esales/oxideshop-unified-namespace-generator[v1.0.0].
- oxid-esales/testing-library v4.0.1 requires oxid-esales/oxideshop-unified-namespace-generator ^1.0.0 → satisfiable by oxid-esales/oxideshop-unified-namespace-generator[v1.0.0].
- Can only install one of: oxid-esales/oxideshop-unified-namespace-generator[v2.0.0, v1.0.0].
- Can only install one of: oxid-esales/oxideshop-unified-namespace-generator[v2.0.0, v1.0.0].
- oxid-esales/oxideshop-metapackage-ce v6.1.0 requires oxid-esales/oxideshop-unified-namespace-generator v2.0.0 → satisfiable by oxid-esales/oxideshop-unified-namespace-generator[v2.0.0].
- Installation request for oxid-esales/oxideshop-metapackage-ce ^v6.1.0 → satisfiable by oxid-esales/oxideshop-metapackage-ce[v6.1.0].
- Installation request for oxid-esales/testing-library ^v4.0.0-beta.1 → satisfiable by oxid-esales/testing-library[v4.0.0, v4.0.0-beta.1, v4.0.0-beta.2, v4.0.0-beta.3, v4.0.1].
Diese Meldungen vom composer helfen mir nicht wirklich weiter.
Entscheidend war dier Abschnitt require-dev, wobei es mit den Hochstrichen so ” ” nicht funktioniert, sondern so " ".
Woher soll man wissen, was da bei den Versionen geändert werden muss? Woher hast du das?