EROR: float() argument must be a string or a number, not 'datetime.time'

Question

I write this code:

fig = plt.figure()
ax1= fig.add_subplot(111)

sns.lineplot(x=dataset["Time"],y=dataset["Value"], data=df)
plt.title("Energy Consumption vs Time ")
plt.xlabel("Time")
plt.grid(True, alpha=1)
plt.legend()

for label in ax1.xaxis.get_ticklabels():
    label.set_rotation(90)

But this error message appears:

TypeError: float() argument must be a string or a number, not 'datetime.time'

how can i solve this?