Exception in template helper: TypeError: Cannot read property 'length' of undefined
    at Object.findIndexById (https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:193:343429)
    at Object.getElementById (https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:193:343505)
    at e [as findLabel] (https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:193:401390)
    at Function.t [as createLabelById] (https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:193:392841)
    at https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:193:287457
    at Array.map (<anonymous>)
    at Function.e [as resolveLabels] (https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:193:287432)
    at e.getLabels (https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:193:254786)
    at https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:79:31289
    at https://4minitz.felixble.de/d361de0337ccbbf94f803f8e771f9bd24eafbba0.js?meteor_js_resource=true:79:17146