Ionic serve error Cannot read property 'call' of undefined

Ionic Framework ionic-v3

varid68 July 19, 2017, 5:09am 9

hi, it doesn’t work for me

Topic		Replies	Views	Activity
Getting error "Cannot read property 'call' of undefined" ionic-v3	22	6161	December 20, 2018
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TypeError: cannot read property 'toString' of undefined with ionic serve ionic-v3	6	4996	February 25, 2019