Well you need to either replace the led bulbs with incondescent or you need to replace the blinker and flasher units with LED compatible units.
Standard (incondescent) flasher / blinker, note the guts have a contact points inside.
View attachment 1716092524
Led compatible flasher / blinker, note the guts have a circuit board inside and the lead for a dedicated ground. No mechanical contacts.
View attachment 1716092523
Don't be fooled into adding resisters to the circuits for the blinkers to work.
The entire reason I assume you added LEDs was to lighten the load on the wiring. By adding resisters you just increase the load on the wires till the stock units work and that defiets the purpose of the LEDs
