add import for error class
add import for error class

ehealthafrica-ci/onadata,eHealthAfrica/formhub,eHealthAfrica/onadata,SEL-Columbia/formhub,spatialdev/onadata,qlands/onadata,mainakibui/kobocat,GeoODK/onadata,wesley1001/formhub,ehealthafrica-ci/formhub,ehealthafrica-ci/formhub,spatialdev/onadata,ehealthafrica-ci/onadata,GeoODK/formhub,makinacorpus/formhub,kobotoolbox/kobocat,ehealthafrica-ci/formhub,spatialdev/onadata,kobotoolbox/kobocat,smn/onadata,piqoni/onadata,hnjamba/onaclone,ultimateprogramer/formhub,SEL-Columbia/formhub,wesley1001/formhub,qlands/onadata,sounay/flaminggo-test,hnjamba/onaclone,kobotoolbox/kobocat,eHealthAfrica/onadata,SEL-Columbia/formhub,SEL-Columbia/formhub,smn/onadata,ultimateprogramer/formhub,hnjamba/onaclone,awemulya/fieldsight-kobocat,piqoni/onadata,piqoni/onadata,smn/onadata,mainakibui/kobocat,jomolinare/kobocat,GeoODK/formhub,sounay/flaminggo-test,qlands/onadata,piqoni/onadata,ehealthafrica-ci/formhub,jomolinare/kobocat,makinacorpus/formhub,GeoODK/onadata,spatialdev/onadata,awemulya/fieldsight-kobocat,makinacorpus/formhub,GeoODK/onadata,qlands/onadata,jomolinare/kobocat,ultimateprogramer/formhub,kobotoolbox/kobocat,awemulya/fieldsight-kobocat,makinacorpus/formhub,awemulya/fieldsight-kobocat,mainakibui/kobocat,hnjamba/onaclone,eHealthAfrica/onadata,GeoODK/onadata,jomolinare/kobocat,mainakibui/kobocat,smn/onadata,ehealthafrica-ci/onadata,eHealthAfrica/formhub,ehealthafrica-ci/onadata,ultimateprogramer/formhub,eHealthAfrica/formhub,sounay/flaminggo-test,eHealthAfrica/formhub,sounay/flaminggo-test,GeoODK/formhub,wesley1001/formhub,wesley1001/formhub