I have never used ws2813, only ws2812B. I have a strip of 60 x ws2812b working with a Wemos D1 Mini, for example. I do not have any Wemos D1 or D1 R2, but I do not think they should be any different from a D1 Mini for this purpose.
Please try using that resistor as I suggested.
Did you ever have the NeoPixel library installed in the Arduino IDE before NeoPixel was made compatible with ESP? Perhaps your library is out of date, even if you think you have updated it. You could attempt to un-install the NeoPixel library, then check that the folder is gone or empty in your sketchbook/libraries folder, then re-install NeoPixel library.
Also you could try the FastLED library.