This is a known issue in LabVIEW 2019. If you're using LabVIEW any version pre 2019 upgrade to LabVIEW 2019 SP1, through NI Package Manager to solve the issue. If you're still experiencing issues in LabVIEW 2019 SP1 contact NI support.
LabVIEW 2019 SP1 Bug Fixes
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