Multiple steps form using reactjs and tailwindcss

hello @Shafiquedev, this is great effort, however, the app when the last button is clicked on, this error pops up...>. You might want to check that. Happy coding :)

index-1w_SmaCl.js:40 TypeError: Cannot read properties of null (reading 'planEl') at Bd (index-1w_SmaCl.js:40:72242) at yi (index-1w_SmaCl.js:38:19478) at Ga (index-1w_SmaCl.js:40:43712) at Ka (index-1w_SmaCl.js:40:39513) at vd (index-1w_SmaCl.js:40:39444) at qr (index-1w_SmaCl.js:40:39302) at Do (index-1w_SmaCl.js:40:35719) at $u (index-1w_SmaCl.js:40:36520) at ht (index-1w_SmaCl.js:38:3258) at index-1w_SmaCl.js:40:34066