Fatal error with enemy pathing

[krazyjakee]

An enemy seems to have a problem with pathing which throws a fatal error.

TypeError: Cannot read property 'NaN' of undefined
    at Grid.getNodeAt (/app/node_modules/astar-typescript/dist/core/grid.js:80:42)
    at AStarFinder.findPath (/app/node_modules/astar-typescript/dist/finders/astar-finder.js:40:35)
    at Enemy.findNewTargetTile (/app/src/server/workers/enemies/enemy.ts:120:57)
    at Timeout._onTimeout (/app/src/server/workers/enemies/enemy.ts:70:14)
    at listOnTimeout (internal/timers.js:549:17)
    at processTimers (internal/timers.js:492:7)