Answer
Check the global.customerId and global.customerCode values in your ifscloud-values.yaml file — in a confirmed case, this exact error was caused by these two values being reversed (customerId is expected to be an alphanumeric value, customerCode a numeric one), which produced an invalid value that Kubernetes' label-format validation rejected once it flowed into a generated resource label. Correcting which value goes into which field resolves the invalid-label error and lets the deployment complete.