When trying to translate en:Vantaa to Spanish and adding first paragraph after infobox, cxserver error occurs. By inspecting the request, we get following response:
TypeError: Cannot read property 'replace' of undefined at siteInfoRequest.then (/srv/service/lib/mw/ApiRequestManager.js:194:18) at tryCatcher (/srv/service/node_modules/bluebird/js/release/util.js:16:23) at Promise._settlePromiseFromHandler (/srv/service/node_modules/bluebird/js/release/promise.js:517:31) at Promise._settlePromise (/srv/service/node_modules/bluebird/js/release/promise.js:574:18) at Promise._fulfillPromises (/srv/service/node_modules/bluebird/js/release/promise.js:674:14) at Promise._settlePromises (/srv/service/node_modules/bluebird/js/release/promise.js:700:18) at _drainQueueStep (/srv/service/node_modules/bluebird/js/release/async.js:138:12) at _drainQueue (/srv/service/node_modules/bluebird/js/release/async.js:131:9) at Async._drainQueues (/srv/service/node_modules/bluebird/js/release/async.js:147:5) at Immediate.Async.drainQueues [as _onImmediate] (/srv/service/node_modules/bluebird/js/release/async.js:17:14) at runCallback (timers.js:705:18) at tryOnImmediate (timers.js:676:5) at processImmediate (timers.js:658:5)
Outcome
Fixed an error that caused link and template adaptation to fail sometimes (which prevent translating a given section).